Paper-guard for folding mechanism.



H. A. W. WOOD.

PAPER GUARD FOR FOLDING MECHANISM.

APPLICATION FILED JUNE I6. 1913.

1 ,27 1,644. Patented July 9, 1918.

% UNTE STATES AET OFFICE.

HENRY A. WISE WOOD, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO WOOD NEWSPAPER MACHINERY CORPORATION, OF NEW YORK, N. Y.-, A CORPORA- TION OF VIRGINIA.

PAPER-GUARD FOR FOLDING MECHANISM.

Specification of Letters Patent.

Patented July 9, 1918.

Application filed. June 16, 1913. Serial No. 773,915.

a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a new and useful Paper-Guard for Folding Mechanism, of which the following is a specification. V

This invention relates to the folding rolls forming a part of the folding mechanism used ordinarily on folders of web printing presses.

The principal objects of the invention are to'provide means for preventing any contact of the paper on the folding rolls and especially to prevent-the off one of the two rolls, that is the one toward which the paper is being carried by the cylinder, from engaging the edge of the incoming sheet so as to carry it down and thus wrinkle it.

The invention also involves improvements in details of construction as will appear hereinafter.

' Reference is to be had to the accompanying drawings in which,

Figure 1 is an end elevation of apart of I a folding mechanism showing the folding rolls and some other parts in transverse section and showing one form of this invention applied thereto;

Fig. 2 is a plan of one of the folding rolls and guards therefor; and

Fig. 3'is a sectional view of the same on the line 33 of Fig. 2.

The invention is shown as applied to a folding mechanism comprising a folding cylinder 1, a cutting cylinder 2 and folding rolls 3 and 4. The folding cylinder is shown as provided with the usual folding blade 5 and paper forwarding pins 6.

As ordinarily constructed, the paper is carried around the folding cylinder until it reaches the position in which it is out. Then it is tucked into the nip of the folding rolls 3 and 4 by the folding blade. Then it is folded and forwarded by the folding rolls to the delivery guide 8. The rolls 3 and 4 run ordinarily at a much higher rate of speed than the cylinder 1. Ordinarily contact between the paper and the rolls 3 and 4: causes ofi'setand sometimes wrinkles. Moreover, roll 4 runs in a direction opposite to the direction of motion of the paper before it begins to be folded. Thus it sometimes strikes thepaper off the forwarding pins, particularly the outer sheet or sheets when a considerable number are folded at once.-

Then the edge of the incoming sheet strikes the roll 4 and goes between the rolls. It is to avoid these difliculties that this invention is made. 7

For this purpose a pair of stationary rods 10 are mounted parallel with the folding rolls and fixed to the frame of the machine. 011 these rods are fixed arms 11 which extend inwardly toward the rolls and project over them. These arms preferably extend into grooves 12 in the rolls which are provided to receive the forwarding pins 6. They are provided with convex upper surfaces which have 'a greater radius than that of the rolls so that these surfaces extend into a position to keep the paper from contact with the rolls. These arms are shown as arranged in pairs extending into each of the grooves 12. These arms thus constitute guards and a plurality of them may constitute the entire guard. However, I have shown them as supplemented by sheet metal plates 13 secured to the arms and partaking of the curvature thereof. Preferably, these are used but they may be dispensed with if desired. When used they are separated at their'ends over the grooves 12 to provide a space for the pins 6. The rolls 3 and 4 are shown as-fiuted.

The operation of the arrangement will be obvious. The guard located over the roll 1 is of particular importance because it prevents the incoming forward edge of the sheet from bending down and striking the roll 1 and thus being forced by the rotation of the roll into the bite. With this guard in position the incoming edge will strike it if it comes along in a low position. Then it is forced upwardly along it by the movement of the folding cylinder, thus restoring the paper to its proper position. Both guards also prevent off-set and wrinkling during the folding operation, by preventing the folding rolls having any contact with the paper other than what is required to perform the necessary folding operation.

Althou h I have illustrated only one form and descrlbed only two forms of the invention and shown it as applied to a single type -.roll,wthesur-face "of which roll-moves-in a direction opposite-t0 that of the sheet, a guard interposed between the said cylinder and; said roll to, Preventthe leading: edge of the sheetfromcontacting with said roll, said guard being' located out of the pathway of the said pins.

2. The combination with-afolding cylinderhaving forwardin'gpins and arranged to carry sheets on-its "surface and apairfof folding rolls located closely adj acent thereto to receivethe sheets therefrom, of a guard extending-over the off roll toward which the leading edgeof the sheet =.is fed' by [the cylinder, said guard beingnrrangeclto permit I the-; pins to pass through 'itland; extending into the space between the two rolls to prevent-contact of the leading edge of the-sheet with saidofl roll. v v 3. The combination with a folding cylin- 1 der'--having forwarding;pins-and arranged to carry sheets on itssurfacefand a-jpair of folding rolls-located closelyadjacent thereto toirec'eive the sheets-therefrom,- ofa pair of guards extending over-the folding rolls and one of--them being arranged to; permit the pins; to pass through it, the ends of said guards? projecting into the space between said folding rolls to prevent contact ofvthe leading-edgebf the sheet-With said rolls Copies of this patent-maybe obtained for when the sheet folding.

4. The combination With a folding roll of passes over them before arms located 7 in planes transyerse -to the aX1s ofsaid roll 'and intersecting its 1cyl1ndrical surface, and having convex guard surfacesbeyond the c rcumference of the roll.

5. The combination with a foldlng roll 'havingcircumferential grooves of arms eX- tending into said grooves, and convex: plates secured to said arms over the roll, and spaced apart at their ends.

6. The combination -with---a-;folding ylinder having forwarding, pins :and a folding roll of l a: plurality of-guaidplates projecting between said cylinder and: roll .--having spaces between them for 1 the forwarding pins. 2 L v V 7. -The combination w th a-foldmg cyl1nder having forwarding pins and a pairiof,

folding rolls, ofarms projecting over the surface of one of i said rolls, and a plurality of thin plates mounted on said; arms over the roll having spaces between them for --the forwarding pins.

8. 111 a folding mechanism, the co1nbi-natlOlI- of i a folding cylinder having forward ing pins for carryingsheets, a pair :of-foldingrolls;- adapted to fold the sheets carried by the said cylinder,1one of which rolls runs at its top side in a directioneopposite' to "that of the saidsheets, and guard, interposed between the said cylinder anderoll and adapted to prevent the said rollffroni stripping the leading edges of the sheetsifrom thepinaduring their passage OYBL the roll.

In testimony whereofilfhavehereunto setmy hand, in the presence of twotsubscribinig witnesses.

Vllitnesses c B. N. STOEBER, LI'IJL'IAM *Jonns,

Q? dents a h by addressing the Commissioner f ra -eats; tlfashjnzton,"I). c." V 1 HENRY AJ'WISElWOQD, T 

